Please install package: \'Xamarin.Android.Support.Design\' available in SDK installer. Android resource directory C:\\Users\\Srinivasarao\\AppData\\Local\\Xamarin\\Andro
1: Download "https://dl-ssl.google.com/android/repository/android_m2repository_r22.zip" into your (mediafire.com or other upload center websites)
2: Download "android_m2repository_r22.zip" from your mediafire panel into your computer
3: Rebuild your solution to get list of error codes
4: Find error(Error Reason: "C:\Users\Vahid\AppData\Local\Xamarin\zips\96659D653BDE0FAEDB818170891F2BB0.zip" is not a valid zip file)
5: Copy your android_m2repository_r22.zip into "C:\Users\Vahid\AppData\Local\Xamarin\zips\" directory
6: Rename "android_m2repository_r22.zip" to "96659D653BDE0FAEDB818170891F2BB0.zip"
7: Rebuild your solution
8: Enjoy xamarin form.
List of md5 name for your download file are available in "https://developer.xamarin.com/guides/android/troubleshooting/resolving-library-installation-errors/#Manually_Downloading_m2repository"
check https://stackoverflow.com/a/38367810/2920206
Download android_m2repository_r25.zip related to API Level 21.0.3 and putit on this path C:\Users\USERNAME\AppData\Local\Xamarin Folders and Zip and extract it.
i hope it will work.
Delete all from the path: C:\Users\USERNAME\AppData\Local\Xamarin Folders and Zip files. And then rebuild your project.
To launch the Android SDK on Windows, navigate to the Tools > Android menu and select Open Android SDK Manager.
The SDK Manager window will open.
You can use this Android SDK manager to select tools, documentation, and the SDK that you wish to download or update.
Ref: https://developer.xamarin.com/recipes/cross-platform/ide/launch_sdk_manager/
1) Delete the "21.0.3" folder within in your AppData dir (reference your error)
2) Rebuild your application.